Acquisitions and Divestitures (Tables)

12 Months Ended

Dec. 31, 2017

WPX Property Acquisition [Member]

Business Acquisition [Line Items]

Summary of Consideration Paid and Fair Value of Assets Acquired and Liabilities Assumed

Consideration:		(in millions)
Cash	$	270
Recognized amounts of identifiable assets acquired and liabilities assumed:
Assets acquired:
Proved natural gas and oil properties		31
Unproved natural gas and oil properties		114
Intangible asset		109
Gathering system		22
Other		1
Total assets acquired		277
Liabilities assumed:
Asset retirement obligations		(7)
Total liabilities assumed		(7)
	$	270